“EFFECT OF ULTRAVIOLET RADIATION ON THERMAL INSULATION OF NATURAL COMPOSITE MATERIALS”, J. eng. sustain. dev., vol. 19, no. 5, pp. 147–162, Sep. 2015, Accessed: Apr. 28, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/820